Photopolymerizable compositions containing selected cellulose ac

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making

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430306, 430314, G03C 168

Patent

active

041959973

ABSTRACT:
Photopolymerizable compositions or layers containing an ethylenically unsaturated compound, a photoinitiator or photoninitiator system, and at least one polymeric binder, at least half of the binder being cellulose acetate butyrate having a composition of 44 to 50 weight percent butyryl, 5.0 to 8.5 weight percent acetyl and 0.5 to 1.0 weight percent hydroxyl. The use of the specific cellulose acetate butyrates in photopolymerizable compositions improves cold flow resistance and processability, i.e., development. The compositions and layers are particularly useful in preparing dry film photoresists and solder masks.

REFERENCES:
patent: 3479185 (1969-11-01), Chambers
patent: 3558322 (1971-01-01), Fan
patent: 3784378 (1974-01-01), Gramas
patent: 4058443 (1978-11-01), Murata et al.

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